<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">   
 <title>开始学习css了</title>
<style>
    p
    {
        color: red;
        text-align:center;
    }
    </style>
    </head>
    <body>
        <p>Hellow world!</p>
        
        <p>这个段落采用css样式化。</p>
    </body>
    </html>